I have a Mac G4 dual 1.42 with 2 gigs of ram, OS 10.4.11, and a Pioneer DVR115D Superdrive. Recently I started getting buffer underrun errors every time I try to burn a dvd (Verbatim -r). I'm using an older version of Popcorn which has always worked well for me. This problem started after I went to satellite internet and a Belkin wireless router. I have verified that I have the latest firmware and software upgrades. I even wiped one of my internal drives and installed a basic system(10.4.6) and a fresh install of Popcorn and used it for my start-up disc but it didn't help. I am at my wits end with this and wondered if you could help.